usr/src/usr.bin/nohup/nohup.1

.\" Copyright (c) 1989, 1990 The Regents of the University of California.
.\" All rights reserved.
.\"
.\" This code is derived from software contributed to Berkeley by
.\" the Institute of Electrical and Electronics Engineers, Inc.
.\"
.\" %sccs.include.redist.roff%
.\"
.\"     @(#)nohup.1     6.8 (Berkeley) %G%
.\"
.Dd
.Dt NOHUP 1
.Os
.Sh NAME
.Nm nohup
.Nd invoke a command immune to hangups
.Sh SYNOPSIS
.Nm nohup
.Ar command
.Op Ar arg ...
.Sh DESCRIPTION
The
.Nm nohup
utility invokes
.Ar command
with
its arguments
and at this time sets the signal
.Dv SIGHUP
to be ignored. The signal
.Dv SIGQUIT
may also be set
to be ignored.
If the standard output is a terminal, the standard output is
appended to the file
.Pa nohup.out
in the current directory.
If standard error is a terminal, it is directed to the same place
as the standard output.
.Pp
.Nm Nohup
exits 1 if an error occurs, otherwise the exit status is that of
.Ar command  .
.Sh ENVIRONMENT
The following variable is utilized by
.Nm nohup .
.Bl -tag -width flag
.It Ev HOME
If the output file
.Pa nohup.out
cannot be created in the current directory, the
.Nm nohup
utility uses the directory named by
.Ev HOME
to create the file.
.El
.Sh SEE ALSO
.Xr signal 3
.Sh STANDARDS
The
.Nm nohup
command is expected to be
.St -p1003.2
compatible.